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(Y, Ce, Eu, Bi)<3>(Al, Ga)<5>O<12> fluorescent powder and preparation method thereof

A fluorescent powder and chemical formula technology, applied in the field of 35O12 fluorescent powder material and its preparation, can solve the problems of difficult separation, difficult batch preparation, high cost, etc.

Pending Publication Date: 2020-05-19
ZAOZHUANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation process, there are not only problems such as complex synthesis process, long preparation cycle and difficult separation, but also high cost and difficult batch preparation.

Method used

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  • (Y, Ce, Eu, Bi)&lt;3&gt;(Al, Ga)&lt;5&gt;O&lt;12&gt; fluorescent powder and preparation method thereof
  • (Y, Ce, Eu, Bi)&lt;3&gt;(Al, Ga)&lt;5&gt;O&lt;12&gt; fluorescent powder and preparation method thereof
  • (Y, Ce, Eu, Bi)&lt;3&gt;(Al, Ga)&lt;5&gt;O&lt;12&gt; fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to (Y 1-x-y-z , Ce x , Eu y , Bi z ) 3 (Al 1-w , Ga w ) 5 o 12 The stoichiometric ratio accurately weighs the high-purity grade Y(NO 3 ) 3 ·6H 2 O, Ce(NO 3 ) 3 ·6H 2 O, Eu(NO 3 ) 3 ·6H 2 O, Bi(NO 3 ) 3 ·6H 2 O, Al(NO 3 ) 3 9H 2O, Ga(NO 3 ) 3 The cation source, specifically, the x value is 0.01, the y value is 0.05, the z value is 0.05, and the w value is 0.04;

[0027] According to said cation: the stoichiometric ratio of CA:EG is 2:2:1, accurately weigh the chelating agent of CA and EG;

[0028] according to figure 1 Assemble the device, dissolve the cationic reagent and the chelating agent in deionized water sequentially to form a reaction mixture solution, stir and heat to 50° C. for about 0.5 hours to prepare a sol solution.

[0029] Adjust the temperature of the tetramethylsilicone oil in the oil bath to 100 °C, and at the same time adjust the stirring speed of the magnetic stirrer to ~15 r / min to make it stir evenly, and try no...

Embodiment 2

[0040] (Y prepared in Example 1 1-x-y-z , Ce x , Eu y , Bi z ) 3 (Al 1-w , Ga w ) 5 o 12 and Comparative Example 1 (Y 1-x-y , Ce x , Eu y ) 3 (Al 1-w , Ga w ) 5 o 12 To characterize,

[0041] The powder X-ray diffraction technique was used to characterize the crystal structure of the ground phosphor, and the results were as follows figure 2 shown;

[0042] The fluorescence emission performance of the ground phosphor powder was characterized by the fluorescence emission spectrum with an excitation wavelength of 454 nanometers, and the results are as follows image 3 shown.

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Abstract

The invention provides (Y, Ce, Eu, Bi)<3>(Al, Ga)<5>O<12> fluorescent powder and a preparation method thereof. The fluorescent powder is mainly applied to the technical field of semiconductor illumination and display. Particularly, the fluorescent powder takes cerium-doped yttrium aluminum garnet (YAG: Ce) as a base material, the base material is doped with Eu, Bi and Ga elements, and the preparedfluorescent powder also has a low color rendering index (CRI) of red light while keeping fluorescence intensity. The invention also provides a preparation method of the fluorescent powder. The preparation method specifically comprises the following steps: solution preparation, sol formation, gel synthesis, gel grinding, gel sintering, fluorescent powder grinding and fluorescent powder screening and collection. The preparation method is simple, feasible and good in dispersion uniformity.

Description

technical field [0001] This application relates to the field of semiconductor lighting and display technology, especially to a (Y, Ce, Eu, Bi) 3 (Al,Ga) 5 o 12 Phosphor powder material and its preparation method. Background technique [0002] Phosphor powder refers to an inorganic powder material that can emit photons under certain cathode ray excitation, electric excitation or light excitation conditions, also known as luminescent powder, phosphor or crystalline phosphor. In particular, photoluminescent phosphors are the most widely used, and the research on them is the most in-depth. Among them, cerium-doped yttrium aluminum garnet (YAG:Ce) yellow phosphor has high electro-optical conversion efficiency, low luminous energy consumption, long service life, creep resistance, impact resistance, stable chemical properties, controllable cost, and reliability. It is widely used in many fields such as display, projection, lighting, LED and fluorescent probes due to its advanta...

Claims

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Application Information

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IPC IPC(8): C09K11/80
CPCC09K11/7792
Inventor 任衍彪何小武石铁生张临财亓敬波宋梦远邵衡
Owner ZAOZHUANG UNIV